The forming of special section tubes with roll extrusion method is a new technology.
异型钢管滚挤成形是一种新技术。
It is shown that equal channel angular extrusion is a new method of grain refinement.
实验证明：等通道转角挤压技术是细化晶粒的新方法。
The method to determine the suitable extrusion variable is put forward.
并提出了确定合适挤压量的方法。
The results show that the method of the closed extrusion-forging technology is very efficient.
结果表明，闭式挤锻工艺的新方法是十分有效的。
The results show that the method of the closed extrusion-forging technology is very efficient.
结果表明，闭式挤锻工艺的新方法是十分有效的。
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